Question

the circumference of a circle exceed its diameter by 18 cm find the circumference of the circle​

Answer 1

Answer:

Step-by-step explanation:

Let the radius of the circle be r

2$\pi$r= 18 + 2r (diameter = 2 x radius)

2r x $\pi$=18 + 2r

r x $\pi$ = 9 + r (dividing by 2 on LHS and RHS)

22/7 x r = 9 + r

r ( 22/7 -1 ) = 9 (Taking the r from RHS to LHS)

r (22-7) / 7 = 9

r (22-7) = 63

r(15) = 63

r = 63 / 15

r= 4.2cm